Arduino In-Circuit Tester: Build Project

[Dave2084]

Sorry I've been silent of late, life is keeping me busy, but the project isn't forgotten!

I will get the william's code tidied up and committed soon (ish) ...

 

[guddler]

I'm hoping that it won't be too many more weeks before I can take another look at this. Real life has very much been getting in the way of late and will continue to do so for a bit longer...

 

[nauseous]

Have been following this for the past few months. Have a nutcase 6802 project I am working on but can't justify the price of a fluke pod so thought I would give this a go.

PCB's should be arriving this week for the tester. Once I have something assembled was planning to start writing code for the 6802. It would be awesome to see that williams code up.

And hello all. First post!

 

[Battlezone]

Nes4Life kindly loaned his ICT board while we wait for the latest batch of boards to arrive (thanks matey) so I've started to have a play with the ICT.

Paul,

Adding a new set of ROMs to the code isn't hard, but to save a little effort I've pre-generated ROM templates for a few of the older games. I'll put the script and list on dropbox. Just copy the required

section of code from the listing file and fill in the ROM starting address by hand.

I limited the templates to games with ROMs between 2K and 8K in size (i.e the older games).

I also skipped any small PROMs (I'm not sure how best to code ROMS 1K in size or smaller).

So far there are almost two and a half thousand templates, so hopefully some of the games

we tackle will be in the list.

The templates are here: https://dl.dropboxusercontent.com/u/39934793/arcade/roms_list.txt

The script is here: https://dl.dropboxusercontent.com/u/39934793/arcade/gen_rom_info.py

Here's an example of a generated template:

// ROMS: scrambles
	static const UINT8 s_romData2n_2d[]  = {0x32,0x01,0xc3,0x77,0x77,0x85,0x7e,0x4e,0x82,0x70,0x2b}; // scrambles/2d(__scrambles)
	static const UINT8 s_romData2n_2e[]  = {0x78,0xd1,0xd1,0xd1,0xd1,0xd1,0xd1,0xd1,0xd1,0xd1,0x1f}; // scrambles/2e(__scrambles)
	static const UINT8 s_romData2n_2f[]  = {0x06,0xff,0x0c,0x40,0x0f,0x11,0x40,0xc9,0x14,0x1d,0x39}; // scrambles/2f(__scrambles)
	static const UINT8 s_romData2n_2h[]  = {0x40,0x35,0x36,0x3e,0x22,0x07,0x23,0x19,0x06,0x05,0x40}; // scrambles/2h(__scrambles)
	static const UINT8 s_romData2n_2j[]  = {0x2d,0x05,0xf7,0x10,0x3d,0x10,0xcd,0x07,0x05,0xdd,0x0f}; // scrambles/2j(__scrambles)
	static const UINT8 s_romData2n_2l[]  = {0x03,0xc6,0xfe,0x7e,0x09,0x00,0x3e,0x03,0xdd,0xfd,0x00}; // scrambles/2l(__scrambles)
	static const UINT8 s_romData2n_2m[]  = {0xc9,0x3a,0x42,0x1b,0x41,0x11,0x01,0x5e,0xc3,0x30,0x00}; // scrambles/2m(__scrambles)
	static const UINT8 s_romData2n_2p[]  = {0xd8,0xd1,0xd1,0xd1,0xc7,0xc7,0xd8,0xd1,0xd1,0xd1,0xff}; // scrambles/2p(__scrambles)
	static const UINT8 s_romData2n_5f[]  = {0x7c,0xc2,0x86,0x02,0x62,0x08,0x0c,0x00,0x70,0x1c,0x00}; // scrambles/5f
	static const UINT8 s_romData2n_5h[]  = {0x7c,0xc2,0x86,0x02,0x62,0x08,0x0c,0x00,0x70,0x00,0xff}; // scrambles/5h
	
	static const ROM_REGION s_romRegion_scrambles[] PROGMEM = {
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2d,  0xb89207a1, " 2d"}, // scrambles/2d(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2e,  0xe9b4b9eb, " 2e"}, // scrambles/2e(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2f,  0xa1f14f4c, " 2f"}, // scrambles/2f(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2h,  0x591bc0d9, " 2h"}, // scrambles/2h(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2j,  0x22f11b6b, " 2j"}, // scrambles/2j(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2l,  0x705ffe49, " 2l"}, // scrambles/2l(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2m,  0xea26c35c, " 2m"}, // scrambles/2m(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_2p,  0x94d8f5e3, " 2p"}, // scrambles/2p(__scrambles)
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_5f,  0x5f30311a, " 5f"}, // scrambles/5f
	    {NO_BANK_SWITCH, 0x0000, 0x0800, s_romData2n_5h,  0x516e029e, " 5h"}, // scrambles/5h
	    {0}
	};

[/QUOTE]

 

[PaulSwan]

Cool, Battlezone.

I've completed an implementation of the DEC T11 on Atari System 2 based games:

https://github.com/prswan/arduino-mega-ict/tree/t11

The current plan is to add the Intel 8080 on Space Invaders next.
Paul.

 

[david_orton_2000]

Excellent!
This is still a cool project.

I still need to finish building mine, just been a bad year for arcades+electronics till around now, where things are calming down...now to get stuck in!!!

 

[Judder]

Just a quick bump for the project and to say that SainSmart have just put their Arduino Mega boards + LCD shield on sale at $21.99 - very reasonable for great kit that will give you everything you need bar the PCB boards

http://www.sainsmart.com/sainsmart-mega2560-1602-lcd-keypad-shield-kit-for-atmel-atmega8u2-avr-1.html

 

[Nes4life]

Is Asteroids now supported? What's the latest on the project?
I have to apologise and say that although I was planning on making a Mac client I'm now smothered by work and have little free time for coding.

Any way this project could double up as an IC tester with a different head? Got myself a ZIF connector and have started my first proper steps in the world of board repairs. Being able to pull out an IC and validate it would be very handy. Seen a few arduino mega projects online and thought this one would lend itself well to that.Nes4life2016-07-29 08:40:32

 

[guddler]

Hi Phil,

Apologies but I don't think Asteroids is yet. I was looking at it and have code at my end and all sorts but then I changed jobs and have been swamped ever since. I know the 6502 code base went through a bunch of changes ages ago now so it would probably need looking at almost from scratch.

The good news (if you want to call it that) is that I have since sold ALL of my fluke kit. There is not a pod or anything anywhere. So next time I want to repair one of my machines I may have an incentive to look at this again.

I genuinely have no clue when that will be though. I'm currently working two jobs and spare time is virtually non existent.

Martin.

 

[wakko]

Before I look at ordering the boards from OSH Park, does anybody have any of the PCB's they'd be willing to sell?

 

[silverfox0786]

Before I look at ordering the boards from OSH Park, does anybody have any of the PCB's they'd be willing to sell?

i have a couple spare

 

[wakko]

PM'd

 

[PaulSwan]

I've implemented a first attempt at 8080 for Space Invaders based on the original universal probe head with 4 track cuts to isolate the 4 non-TTL lines. This works OK for ROM, inputs & outputs (e.g. sounds). What doesn't work is the video DRAM due to strict timing (same limitation as andrewsm's tester).

A bit of experimentation strongly suggests that with some code optimizations and a dedicated 8080 probe head the video DRAM can be made to work. A V1.00 of the dedicated 8080 probe head was sent of to OSHPark today. If this does in fact work it may also open up the possibility of dedicated probe heads for 6502 & 6809 that negate the need for clock master...

Paul.

 

[Nes4life]

I'd like to put in another request for Asteroids support

I'm all about 6502... got a line of asteroids boards all waiting for me to start my vec-repair journey.

 

[PaulSwan]

I received my 8080 CPU dedicated probe head boards back from OSH Park and they worked well:

https://www.oshpark.com/shared_projects/Hlgfppjs

The code is also now updated to support this dedicated probe head for 8080 with full DRAM test support on Space Invaders.

Paul.

 

[silverfox0786]

hmmm thats cool

if there is a group fabrication of the head im in for an 8080 pcb

 

[space_invader]

I received my 8080 CPU dedicated probe head boards back from OSH Park and they worked well:

https://www.oshpark.com/shared_projects/Hlgfppjs

The code is also now updated to support this dedicated probe head for 8080 with full DRAM test support on Space Invaders.

Paul.

Is the only difference between this and the universal head the resistors on pins 15 & 22?

 

[PaulSwan]

No, the pin to port mappings have also been aligned so that the address & data busses are port byte aligned so that the data bus can be manipulated in one instruction. The critical timing control signals have also been grouped into a single byte port so that one instruction can update them all. This was needed to be able to hit an accurate bus cycle time to allow the DRAM access to work.

I've just finished adding support for testing the shifter circuit and extended the RAM test to more thoroughly test the DRAM (that has some very obscure failure modes). I've been using the tester these last couple of weeks to fix a batch of Space Invaders boards.

Paul.

 

[Nes4life]

Hey Paul, I've finally finished my Asteroids vector test bench

If anyone has tests for Asteroids available then I'd love to have access to them.
I'm happy to test the tests, give feedback and even write some myself. I've quite a number of pcbs ready to test & diagnose.

Nes4life2017-02-05 20:46:09

 

[PaulSwan]

Cool! I've just finished the probe head PCB for the Motorola 68000. Still working on the software for it (on a GX400 Konami GT).